Tso, thanks for letting me know how it should work. mYTube works as designed, it was a case a PEBKAC: I initially copied the URL off desktop manually and naturally O-> 0 (I hate it when they don't have the slashes...)

Fixed that and the search function found the video in no time.

Maybe my user error suggests there could be a feedback message when no hits are found? I was left thinking that nothing happened even behind the scenes.